Is it common to have many loop cuts?
It is common to add loop cuts to a model. It is also common to keep loop cuts to a minimum.

A bit of planning can help prevent loop cuts getting too excessive. In your example you have loop cuts to define edges of parts of your window shutters, these don't need to continue all the way around the house. The window shutter could be an object that is separate from the house with loops cuts that only exist in the shutter. Even if you keep everything contained in one mesh, you can have disconnected mesh parts that contain loop cuts that are local to each part.